addConstantBands(value, *names, **pairs)

Adds bands with a constant value

names: final names for the additional bands
value: constant value
pairs: keywords for the bands (see example)

return the function for ee.ImageCollection.map()



In [1]:

    
import ee
ee.Initialize()



In [2]:

    
from geetools import tools



In [3]:

    
col = ee.ImageCollection('COPERNICUS/S2').select(['B1', 'B2', 'B3']).limit(10)

helper function to print values for the centroid of the first image of a collection



In [4]:

    
def print_center(collection):
    first = ee.Image(collection.first())
    p = first.geometry().centroid()
    return tools.image.getValue(first, p, scale=10, side='client')

Option 1 - arguments



In [5]:

    
newcol = col.map(lambda i: tools.image.addConstantBands(i, 0, "a", "b", "c"))



In [6]:

    
print_center(newcol)









    Out[6]:





{'B1': 1730, 'B2': 1615, 'B3': 1769, 'a': 0, 'b': 0, 'c': 0}

Option 2 - keyword arguments



In [7]:

    
newcolCK = col.map(lambda i: tools.image.addConstantBands(i, a=0, b=1, c=2))



In [8]:

    
print_center(newcolCK)









    Out[8]:





{'B1': 1730, 'B2': 1615, 'B3': 1769, 'a': 0, 'b': 1, 'c': 2}

Option 3 - combined



In [9]:

    
newcolCC = col.map(lambda i:tools.image.addConstantBands(i, 0, "a", "b", "c", d=1, e=2))



In [10]:

    
print_center(newcolCC)









    Out[10]:





{'B1': 1730, 'B2': 1615, 'B3': 1769, 'a': 0, 'b': 0, 'c': 0, 'd': 1, 'e': 2}



In [ ]: